contrib/include/wx/mmedia/sndcpcm.h

   1 // --------------------------------------------------------------------------
   2 // Name: sndcpcm.h
   3 // Purpose:
   4 // Date: 08/11/1999
   5 // Author: Guilhem Lavaux <lavaux@easynet.fr> (C) 1999
   6 // CVSID: $Id$
   7 // --------------------------------------------------------------------------
   8 #ifndef _WX_SNDCPCM_H
   9 #define _WX_SNDCPCM_H
  10
  11 #ifdef __GNUG__
  12 #pragma interface "sndcpcm.h"
  13 #endif
  14
  15 #include "wx/defs.h"
  16 #include "wx/mmedia/defs.h"
  17 #include "wx/mmedia/sndbase.h"
  18 #include "wx/mmedia/sndcodec.h"
  19
  20 //
  21 // PCM converter class
  22 //
  23
  24 class WXDLLIMPEXP_MMEDIA wxSoundStreamPcm: public wxSoundStreamCodec {
  25 public:
  26     typedef void (*ConverterType)(const void *buf_in, void *buf_out,
  27                                   wxUint32 len);
  28
  29     wxSoundStreamPcm(wxSoundStream& sndio);
  30     ~wxSoundStreamPcm();
  31
  32     wxSoundStream& Read(void *buffer, wxUint32 len);
  33     wxSoundStream& Write(const void *buffer, wxUint32 len);
  34
  35     bool SetSoundFormat(const wxSoundFormatBase& format);
  36
  37     wxUint32 GetBestSize() const;
  38
  39 protected:
  40     wxUint32 GetReadSize(wxUint32 len) const;
  41     wxUint32 GetWriteSize(wxUint32 len) const;
  42
  43 protected:
  44     ConverterType m_function_out, m_function_in;
  45
  46     // Static temporary buffer
  47     char *m_prebuffer;
  48     wxUint32 m_prebuffer_size;
  49     // Estimated best size to fit into the static buffer
  50     wxUint32 m_best_size;
  51     // Multiplier for IO buffer size
  52     float m_multiplier_in, m_multiplier_out;
  53 };
  54
  55 #endif